”cutting-edge”means .（ ）。 A: the unimportant B: cutting the edge of something C: the most advanced and the most fashionable D: the insignificant

Cutting edge inclination angle is the angle included between major cutting edge and________. A: cutting edge plane B: reference plane C: major motion direction D: feed direction

We have（ ） a cutting edge advantage.

When installing the turning tool, the turning tool ( ) must coincide with the rotating center of the workpiece. A: main cutting edge B: side cutting edge C: front cutting surface D: blade tip

Among the cutting parameters ,( ) has the greatest influence on the cutting temperature. A: Cutting speed B: Back engagement of the cutting edge C: Feed D: Feeding speed

(10 points) The rake angle is measured in the () plane. A: in the orthogonal plane Po passing the selected point of the main cutting edge B: inside the base Pr passing the selected point of the main cutting edge C: in cutting plane Ps D: none of the above is true

The dip Angle of the blade is measured in () plane. A: cutting plane, ps B: the main point of orthogonal plane cutting edge selected Po C: Within pr of the base plane passing the selected point of the main<br/>cutting edge D: None of the above is correct

The<br/>back angle of the tool is measured in the () plane. A: Cutting plane PS B: In the orthogonal plane Po passing the selected point of the main<br/>cutting edge C: None of the above is true D: Inside the base PR passing the selected point of the main cutting<br/>edge

When the tip of turning tool is at the highest position of the main cutting edge, The inclination angle of the edge is ( ) A: - B: + C: 0 D: uncertain

The sum of rake Angle, clearance angle and wedge Angle is ( ).The sum of the major cutting edge angle, minor cutting edge angle, and tool included angle. is ( ) A: 90 ° , 180 ° B: 90 ° , 90 ° C: 180 ° , 180 ° D: 180 ° , 90 °